Is there any way to have automated UI testing in Apps created with Gluon-Mobile.
E.g does Espresso for Android work with Gluon?
I wouldn't think so since Espresso takes ElementIds but is there any way to work around this?.
Since applications written with Gluon Mobile are a fairly standard JavaFX applications you can try one of JavaFX testing frameworks. I would recomment to start with TestFX framework